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KineticsMCQ

NO(g) + NO3(g) → 2 NO2(g) rate = k[NO][NO3] 50. The reaction represented above occurs in a single stKinetics Chemistry Question

Question

NO(g) + NO3(g) → 2 NO2(g)

rate = k[NO][NO3]

  1. The reaction represented above occurs in a single step that involves the collision between a particle of NO and a particle of NO3. A scientist correctly calculates the rate of collisions between NO and NO3 that have sufficient energy to overcome the activation energy. The observed reaction rate is only a small fraction of the calculated collision rate. Which of the following best explains the discrepancy?
A.

The energy of collisions between two reactant particles is frequently absorbed by collision with a third particle.

B.

The two reactant particles must collide with a particular orientation in order to react.

✓ Correct
C.

The activation energy for a reaction is dependent on the concentrations of the reactant particles.

D.

The activation energy for a reaction is dependent on the temperature.

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